Latridius alexeevi, Bukejs & Kirejtshuk & Rücker, 2011
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publication ID |
https://doi.org/ 10.5281/zenodo.13204258 |
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persistent identifier |
https://treatment.plazi.org/id/26092C3D-FF90-FFCD-83B6-FC0EB39A7541 |
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treatment provided by |
Felipe |
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scientific name |
Latridius alexeevi |
| status |
sp. nov. |
Latridius alexeevi sp. nov.
Material examined
Holotype: Nr. 001, sex unknown; Baltic amber, Upper Eocene; Yantarny Village , Kaliningrad Region, Russia; deposited in the collection of Institute of Systematic Biology , Daugavpils University , Latvia. The complete specimen in a small and thin oval amber piece (with length about 17.5 mm and width 12.0 mm). The mouthparts, partly pronotum and ventral side of specimen are obscured by a “milky” cover.
Differential diagnosis
L. alexeevi sp. nov. ( Figs 1-2 View Figs 1–2 ) is a member of the Latridius minutus group including L. minutus (Linnaeus, 1767) , L. porcatus Herbst, 1793 and L. assimilis Mannerheim, 1844 ( Rücker 2006). The new species differs from recent Latridius species in clearly larger punctures on elytra, shape of pronotum, more rounded posterior angles of pronotum and greater radius of halo behind the mesocoxa ( Figs 2-6 View Figs 1–2 View Figs 3-6 ). The temples of the recent species of the mentioned group are much shorter and acute-angled posteriorly, pronotum trapezoidal, and the punctures on elytra in apical Description
Length 1.2 mm, max. width 0.5 mm. Dorsal surface unicolorous brownish. Elongate, moderately convex ventrally and with strongly convex elytra. Integument nearly mat, only elytra with slight shine.
Head transverse with distinct punctures; temples shorter than width of eye, subparallel; vertex evenly convex, densely punctured. Neck distinctly narrowing. Clypeus transverse. Labrum almost twice as wide as long. Eyes large, strongly convex with moderately large facets. Antennae 11-segmented ( Fig. 7 View Fig ), moderately long, reaching the middle of pronotum. Scape large, subspherical; antennomere 2 subcylindrical, smaller than scape and longer than antennomere 3; antennomeres 3-8 slightly longer than wide; antennomeres 9-11 thick and forming loose club; antennomeres 9 and 10 subcylindrical and each of them about 1.5 times as long as 11 antennomere.
Pronotum about as long as wide, widest in anterior 1/3, slightly narrowed anterad and more posterad; with large, dense punctures, interspaces between them much smaller than a puncture diameter. Sides of pronotum distinctly convex and feebly emarginate; anterior edge shallowly bi-emarginate. Anterior angles moderately projecting forward and somewhat rounded; posterior angles widely rounded. Pronotal disc with two longitudinal flat elevations and four depressions: two deep and oval depressions near
New species of Latridius ( Coleoptera : Latridiidae ) from Baltic amber posteriors angles and also two more shallow and round depressions at anterior angles. Base of pronotal disc with a transverse sulcus. Scutellum small, transverse. Elytra about 1.5 as long as wide combined; widest at the middle; moderately convex at disc and rather steeply sloping at sides; lateral sides widely explanate. Punctures in elytral rows very large and deep, in anterior half of elytra punctures subcontiguous, becoming slightly smaller in posterior half. Interstriae 3, 5 and 7 strongly carinate; interstria 6 moderately carinate; interstria 8 moderately carinate only in the middle; carinae 3 and 5 closed posterad. Epipleura of elytra wide in anterior part and gradually narrowing posteriorly; with large punctures. Meso- and metaventrites covered with dense and distinct punctures.
Legs moderately long and narrow. Femora thickest at the middle and 2.0-2.5 times as wide as tibiae. Tibiae thin and slightly shorter than femora. Tarsi about 2/3 as long as tibiae; tarsomeres 1 and 2 comparable in length; tarsomere 3 markedly longer than both previous ones combined. Claws simple, small and thin.
Etymology
This species is dedicated to our colleague Vitaly I. Alexeev, coleopterologist from Kaliningrad ( Russia).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.